C# Double ToString(String)

Description

Double ToString(String) converts the numeric value of this instance to its equivalent string representation, using the specified format.

Syntax

Double.ToString(String) has the following syntax.


public string ToString(
  string format
)

Parameters

Double.ToString(String) has the following parameters.

format - A numeric format string.

Returns

Double.ToString(String) method returns The string representation of the value of this instance as specified by format.

Example

The following example displays several Double values using the supported standard numeric format specifiers together with three custom numeric format strings.


using System;/*from   w w w .j  a  v  a  2  s .c o m*/

public class MainClass{
  public static void Main(String[] argv){  
    double[] numbers= {1234.12345, -123456789.8377, 1.2345E21, 
                       -1.0573e-05};
    string[] specifiers = { "C", "E", "e", "F", "G", "N", "P", 
                            "R", "#,000.000", "0.###E-000",
                            "000,000,000,000.00###" };
    foreach (double number in numbers)
    {
       Console.WriteLine("Formatting of {0}:", number);
       foreach (string specifier in specifiers) {
          Console.WriteLine("   {0,-22} {1}", 
                            specifier + ":", number.ToString(specifier));
          // Add precision specifiers from 0 to 3. 
          if (specifier.Length == 1 & ! specifier.Equals("R")) {
             for (int precision = 0; precision <= 3; precision++) {
                string pSpecifier = String.Format("{0}{1}", specifier, precision);
                Console.WriteLine("   {0,-22} {1}", 
                                  pSpecifier + ":", number.ToString(pSpecifier));
             }    
             Console.WriteLine();
          }   
       }
       Console.WriteLine();
    }

  }
}

The code above generates the following result.